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National Instruments Corporation
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NI WSN-9791 User Guide and Specifications
Power Requirements
Caution
You must use a UL Listed ITE power supply marked LPS with the NI WSN-9791. The
power supply must also meet any safety and compliance requirements for the country of use.
Input voltage range ................................................9 to 30 V
Maximum required input power ............................4.5 W
Power input mating connector ...............................2 position mini-combicon,
Phoenix Contact part number: 1714977
Note
For EMC compliance, operate this device with shielded cables. The NI WSN-9791 is
guaranteed to power up when 9 V is applied to V and C. After power up, it can operate on as little
as 6 V.
Physical Characteristics
Weight ....................................................................Approx. 250 g (8.8 oz)
Weight with antenna .............................................Approx. 259 g (9.1 oz)
Dimensions ............................................................Refer to Figure 3 for device dimensions
Safety Standards
Note
For UL and other safety certifications, refer to the product label, or go to
ni.com/
certification
, search by model number or product line, and click the appropriate link in the
Certification column.
The NI WSN-9791 is designed to meet the requirements of the following standards of safety for
electrical equipment for measurement, control, and laboratory use:
•
IEC 61010-1, EN 61010-1
•
UL 61010-1, CSA 61010-1
Hazardous Locations
U.S. (UL) ...............................................................Class I, Division 2, Groups A, B, C, D, T4;
Class I, Zone 2, AEx nC IIC T4
Canada (C-UL) ......................................................Class I, Division 2, Groups A, B, C, D, T4;
Class I, Zone 2, Ex nL IIC T4
Europe (DEMKO)..................................................Ex nA nL IIC T4
Safety Voltages
Connect only voltages that are within these limits.
V terminal to C terminal ........................................30 V max, Measurement Category I
Measurement Category I is for measurements performed on circuits not directly connected to the
electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply
system that powers equipment. This category is for measurements of voltages from specially protected
secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy
parts of equipment, circuits powered by regulated low-voltage sources, and electronics.
Caution
Do not connect the system to signals or use for measurements within Measurement
Categories II, III, or IV.
